<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>淘抢购</title>
</head>
<body>
       <h2>淘抢购</h2>
        <button id="btn">换一换</button>
        <hr>
        <div id="list"></div>
    <script src="script.js"></script>
</body>
</html>